#include <algorithm>
#include <bitset>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
int read() 
{
  int x = 0, f = 1;
  char ch = getchar();
  while (ch < '0' || ch > '9') 
  {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch <= '9' && ch >= '0') 
  {
    x = 10 * x + ch - '0';
    ch = getchar();
  }
  return x * f;
}
void print(int x) 
{
  if (x < 0) putchar('-'), x = -x;
  if (x >= 10) print(x / 10);
  putchar(x % 10 + '0');
}
constexpr int N = 300100, P = 998244353;
int qpow(int x, int y) 
{
  int res(1);
  while (y) 
  {
    if (y & 1) res = 1ll * res * x % P;
    x = 1ll * x * x % P;
    y >>= 1;
  }
  return res;
}
int r[N];
void ntt(int *x, int lim, int opt) 
{
  int i, j, k, m, gn, g, tmp;
  for (i = 0; i < lim; ++i)
    if (r[i] < i) swap(x[i], x[r[i]]);
  for (m = 2; m <= lim; m <<= 1) 
  {
    k = m >> 1;
    gn = qpow(3, (P - 1) / m);
    for (i = 0; i < lim; i += m) 
    {
      g = 1;
      for (j = 0; j < k; ++j, g = 1ll * g * gn % P) 
      {
        tmp = 1ll * x[i + j + k] * g % P;
        x[i + j + k] = (x[i + j] - tmp + P) % P;
        x[i + j] = (x[i + j] + tmp) % P;
      }
    }
  }
  if (opt == -1) 
  {
    reverse(x + 1, x + lim);
    int inv = qpow(lim, P - 2);
    for (i = 0; i < lim; ++i) x[i] = 1ll * x[i] * inv % P;
  }
}
int A[N], B[N], C[N];
char a[N], b[N];
int main() 
{
  int i, lim(1), n;
  scanf("%s", a);
  n = strlen(a);
  for (i = 0; i < n; ++i) A[i] = a[n - i - 1] - '0';
  while (lim < (n << 1)) lim <<= 1;
  scanf("%s", b);
  n = strlen(b);
  for (i = 0; i < n; ++i) B[i] = b[n - i - 1] - '0';
  while (lim < (n << 1)) lim <<= 1;
  for (i = 0; i < lim; ++i) r[i] = (i & 1) * (lim >> 1) + (r[i >> 1] >> 1);
  ntt(A, lim, 1);
  ntt(B, lim, 1);
  for (i = 0; i < lim; ++i) C[i] = 1ll * A[i] * B[i] % P;
  ntt(C, lim, -1);
  int len(0);
  for (i = 0; i < lim; ++i) 
  {
    if (C[i] >= 10) len = i + 1, C[i + 1] += C[i] / 10, C[i] %= 10;
    if (C[i]) len = max(len, i);
  }
  while (C[len] >= 10) C[len + 1] += C[len] / 10, C[len] %= 10, len++;
  for (i = len; ~i; --i) putchar(C[i] + '0');
  puts("");
  return 0;
}